Hemorrhoids are caused by too much pressure put on the veins in the rectum forcing blood to stretch and bulge the walls of the veins, sometimes rupturing them.
Most common cause of piles is constipation.
In same cases hems develop due to a genetic predisposition to hemorrhoid weakness in the walls of the veins in the rectal area.
Other causes of hemorrhoids are pregnancy, significant overweight, overeating, heavy lifting and fatigue liver. Sitting or standing in one position for long periods of time and lack of exercise can contribute to the development of hemorrhoid.
In some cases piles can be caused by other diseases orconditions, such as liver cirrhosis, Vitamin B-6 deficiency and acid/alkaline imbalance are indirectly causing piles or fissure, e.g. acid/alkaline imbalance is causing weakness of the veins, and weak veins are more prone to develop hemorrhoids while Vitamin B-6 deficiency may produce fissures and cracking of the corners of the mouth.
About a half of the population have hemorrhoids by the age of 50. Hemorrhoids are very common in both men and women. Women can develop hemorrhoids during pregnancy and after childbirth.